What is A672 Grade B70 tube made of?
ASTM A672 Grade B70 Tube is a high-strength, low-alloy steel tube that is primarily used for industrial applications in medium, high-temperature and high-pressure environments. Below are detailed information about this steel pipe:
Material and Standard
ASTM A672 B70 CL22 steel pipe belongs to the carbon steel category and conforms to ASTM A672/A672M-2019, a standard for electrofusion-welded steel pipe specifically for use in medium, high temperature, and high pressure service.
Chemical Composition
The chemical composition of this steel pipe includes the elements carbon (C), silicon (Si), manganese (Mn), phosphorus (P), and sulfur (S). For example, the content of carbon can be up to 0.31 per cent, manganese content is up to 1.3 per cent, silicon content is between 0.13 per cent and 0.45 per cent, and the content of phosphorus and sulfur both need to be controlled below 0.025 per cent.
| Composition | C | Si | Mn | P | S | |
|---|---|---|---|---|---|---|
| Thickness ≤25mm | Min | - | 0.13 | - | - | - |
| Max | 0.31 | 0.45 | 1.3 | 0.025 | 0.025 |
Mechanical properties
ASTM A672 B70 CL22 steel pipe has high strength and good corrosion resistance for high pressure applications. Specific mechanical properties, such as tensile and yield strength, ensure reliable performance under high pressure and temperature conditions.
